Problem: You are given three numbers. Is there a way to replace variables A, B and C with these numbers so the equality A + B = C is correct?

Input:

There are three numbers X1, X2 and X3 (1 ≤ Xi ≤ 10^100), each on a separate line of input.

Output:

Output either "YES", if there is a way to substitute variables A, B and C with given numbers so the equality is correct, or "NO" otherwise.

Sample Input:

1

2

3

Output:

YES

Sample Input:

1

2

4

Output

YES

Sample Input:

1

3

5

Output

NO

SAMPLE INPUT
1
2
3

SAMPLE OUTPUT
YES

Solution (in PYTHON):

Solution:
'''
# Read input from stdin and provide input before running code

name = raw_input('What is your name?\n')
print 'Hi, %s.' % name
'''
#print 'Hello World!'

n1 = raw_input();
n1 = int(n1)
n2 = raw_input();
n2 = int(n2)
n3 = raw_input();
n3 = int(n3)

s1 = n1 + n2
s2 = n2 + n3
s3 = n3 + n1
s4 = n1 + n1
s5 = n2 + n2
s6 = n3 + n3
if s1 == n3 or s2 == n1 or s3 == n2 or s4 == n2 or s4 == n3 or s5 == n1 or s5 == n3 or s6 == n2 or s6 == n1:
	print "YES\n"
else:
	print "NO\n"